Emergency-exit-door lock.



R. C. @n H. A. HANNUM.

H. L. HANNUM @L L. B. TILLoTsoN, ADMINISTRATORS or H. A. HANNUM, DLGD.

EMERGENCY EXIT DOOR 1.00K.

APPLIOATION FILED JUNE s, 1908.

2 SHEETS-SHEET 1.

Patented (1ct. 1, 1912.

"R. C. L H. HANNUM.

E. L, Hummm & L. B. TILLOTSON, ADMINISTRATORS o1 H. A. HANNUM, DBO'D. EMERGENCY EXIT DOOR LOCK. APPLICATION PILB) JUNE 8,1908.

1,039,7254m Patented 0G@ 1, i912.

2 SHEETS-SHEET 2.

M'neSSes. Z 7i nUNITED 'PATENT FFCE.

:RALPH C. HANNUM, OF SYRACUSE, AND HENRY A. HANNU'M, 0F CAZENOVIA, NEW

YORK; HELEN L. HANNUM AND LESLIE B. TILLQTSON ADMINISTRATORS 0F SAID- HENRY A. HANNUM, DECEASED.

EMERGENCY-EXIT-DOOR LOCK.

Specification of Letters Patent.

' Application filed .T une 8, 1908. Serial No. 437,362.

To all whom it may concern:

Be it known that we, RALPH C. HAXNUM and HENRY A. HANNUM, of Syracuse and Cazenovia, respectively, in the counties of Onondaga and Madison, respectively, in the State of New York, have. invented new and useful Improvements in Emergency-Exit- Docr Locks. of which the following, taken in connection with the accompanying drawingsv` is a full, clear, and exact description.

This invention relates to certain improvements in emergency exit. door locks and refers more particularly to an emergency lcck release mechanism for single or double doors for schools and other private or publie buildings where large numbers of people are accustomed to assemble.

The device is particularly useful in connection with outwardly swinging double doors which require some effective means for locking them at night and atother times when the building not occupied and also to prevent undue swinging of the doors under wind pressure when the building is occupied and at the same time to permit the doors to be readily unlocked and opened by mere pressure upon the inside in case of tire or other emergency requiring the hasty exit of the occupantsI ot' the building.

The broad object of the present invention is to obviate as far as practicable serious injury to those attempting to escape by providing the inside of the door with a movable panel or pressure plate connected to the locking means and located in such relation to the floor that the voluntary or involuntary pressure of any person or assemblage of people against the panel Awill automatically release the locking bolt or members and cause the doors to open outwardly thereby avoiding undue congestion by permitting free exit of the people from the building as soon as they begin to press against the door in their effort to escape.

ln the use of doubltl swinging exit doors. it is customary to lock one of the doors to the sill or lintcl and to provide separate means for locking the other door thereto.

One of the specific objects therefore, of this invention is to enable one. of the doors when unlocked to be moved independently of the other to permit exit to and from the building.

A further object is to construct the lock of -7- which are angular or square in crosse` the independently movable door in suoli manner that 1n ease it is locked, it' will easily release itself from its keeper and permit both doors to swing outwardly as they are' unlocked by pressure upon the movable panel.

A further object is to utilize the movable panel or pressure plate on the inner sideof the door for concealing, and excluding dust and other foreign matter from the bolt opeiating mechanism which is actuated by said p ate.

A still further object is to provide sepa rate means whereby the locking bolt or bolts may be positively thrown to' theirlocking positions and the pressure plate 'or panel returned to its normal or locking posit-ion- Another object is to provide means Whereby the locking bolts and their connections with the panel or pressure plate may be adjusted for different heights of doors or to conform to slight variations in the fittings or hangings of the same sized door.

Other objects and uses will be brought out in the following description.

In the drawings*l"`igure. l is an inner face view of the meeting edges of a pair of ordinary swinging doors equipped with our improved locking and release mechanism. Fig. 2 is a transverse vert-ical sectional View taken on line Q-2. Fig. l. Fig. 3 is an enlarged inner face view o-f the locking and release mechanism, the pressure plate or movable panel being removed to more clearly show the interior mechanism. Fig. t is an enlarged sectional view similar to Fig. 2 taken on line 4 4, Fig. 3. Fig. 5 is a sectional view taken on line 545, Fig. 4. Fig. is an enlarged horizontal sectional view taken on line 6-6. Fig. 1.

In order to clearly demonstrate the. practicability of this invention we have shown the meeting edges of a pair of ordinary swinging doors land 2- as supported in any well known manner between a sill -I'L- and lintel *4 said doors being. pro-v vided at their meeting edges with the usual cap or tinishing rails 5- having their meeting edges convex in cross section as best. seen in Fig. G. These doors are adapted to swing outwardly or inwardly and out,

Wardly, the door --1 being provided with v section and are guided in similarly termed their corresponding rock shafts #93* so tubular metal bearings or guides n8 and that the rock shafts w23- and 28 are adapted to enter suitable keepers 9- and --10-. in the sill --3 and lintel -1 respectively, the outer faces ot' the locking endsof said bolts --6-- and 7- being beveled to permit them to be more easily insorted into or removed from their respective keepers in lockingr and unlocking the door ---l-. The bolts mit and -7- are :idjuslably secured by screw threaded connections to vertically movable locking bars -ll-- and A 2-e which in turn are adjustably secured to suitable mechanism brought into action by ay movable panel or pressure plate 14M on the inside of the door --lwherebyboth of the locking bolts -7- and --6 may be simultaneouslyr redrawn from their locking positions to release the door in a manner hereinafter described. This panel or pressure plate 414-- may be of any suitable forni or size and may be located in any position upon the inner face ot' the door where it would be most liable to be pressed against by any excited or panic stricken individual or assemblage of people in their effort to make a hasty exit from the building in case of tire or other emergency. As shown mounted in rigid bearings which in turn are rigidly secured to the door through the medium of the bracket -21, the latter being secured to the housing -16. by means of screws -30-.

The crank arms 24d which support the movable panel or pressure plate v141-- through the medium of the bracket or plate 15)- aie disposeilin an inwardly and upu'ardly inclined plane (and being pivotally mounted upon the bracket --2l-- in the manner described, and together with said pressure plate or panel Mfare movable upwardly and outwardlv v.into the recess 15 under any comparatively light or heavy pressure which may be brought to bear against such panel by the voluntary or involuntary act of the individual or assembla'ge of people in their e'ort to escape from 1 the interior of the buildings thereby rocking the toothed segments W526--- and transmitting similar rocking movement to the toothed segments M27- which intermesh with the segmentsy -26--- The lower locking rod -1lis pivotall;v but eccentrically connectedto the toothed in the drawings. this panel m-14 is norg m31- while the upper locking rod -lQ-- is inallv raised and consists ot' a box like metal shell haring its open side movable in a rccess -`l5- in the inner side of the door and its outer tace and sides substantially plane and atlal'itcd to fit closely iii the recess r 15- so as to exclude dust and prevent the entrance of wires or other tools or malicious interference with any of the inclosed workl infr parts.

Fitted within the recess d5- is a boxi having its open side tac-ing the interior of the building' and pro like metal easing' le vided with a marginal flange -lTM restingr l l l i against the inner tace ,of the door and .ses

cured thereto by suitable fastening means as screws -l8-.

The movable panel -1lis supported l directlyv upon a retaining plate 10W to vided with inwardlj.' projecting ears -2'2- f in which are journaled lower and upper rock shafts 22% having upwardly and inu I' wardly projecting.r crunk arms M24 which, l

are connected to the lower and upper ends oi the plate tft-- by suitable pivotal pins Rigidly secured to the rock shafts -Qware toothed segments m26-- which mesh with supcrposed segments -Q7-, the latter being rigidly secured to suitable rock shafts Q8- These rock shafts -Q8- are also supported upon inwardly projecting ears 429-w on the brackets w21 directly above segments m27- by pivotal pins or bolts ecccnti'ically connected to the toothed segment --26 by pivotal pins or bolts w32, said pivotal pins or bolts being substantially eqiiimlistant from and at the outside of the swing axes ot' their respective toothed members to which they are pivoted thereby bringing the locking bolts side by side Widthwise oi the door -1- but spaced apart a euthcient distance from each other to prevent friction between tl'iein. said bars being pivoted to opposite faces of their respective toothed members to afford ample elearai'ice in their movement without interfering one with the other.

rl'he toothed members --26u and -QTH ot each enacting pair are of substantially the same pitch and mesh with each other substantially midway between their respective axes and it is. therefore. evident that as they are oscillated or rocked back and forth by the inward and out-ward movement of the panel WMM. the locking bars m1lm and -12W and their bolts --6- and -7- are moved simultaneously in opposite directions; that is when the panel let 'is moved inwardly the locking bolts -6- and -7 are unlocked or withdrawn from their keepers 9-- and Mi0- while on the other hand when the panel is moved in the opposite direction, the bolts t3- *andi-7M are locked or thrown into engagement with said keepers.

As previously stated, the panel M- is l the door and fitting snugly within the fixed housing *16* with just suflicient clearance to ermit it to be operated easily and sti l preventng the entrance of dust or malicious interfeien with thc interior mechanism by wires or any other tool. The panel *14* is, therefore, surrounded with an inwardly projecting marginal Harige, the inner edges of which normally rest within the open side of the hous ing *16*;v sulicientI clearancebeing left within said housing to permit the panel to be folded or rocked upwardly and inwardly until its outer face is nearly iush with the outer face of the door, such movement being sutlicient to withdraw the locking bolts *6* and *7* clear from their respective keepers *9* and *10* and within the lower and upper edges of the door, thereby permitting a free opening of the door under pressure from the inner side.

In order that the door may be positively locked when closed one of the locking bars as *12* is provided with a toothed rack *84* located some distance above the panel *14* and engaged by a pinion *35* which is secured to a rock-shaft *36*, the latter beingl journaled in a suitable bearing *37* and projecting through the inner side of the door where it is provided with a hand piece *38*. This hand piece *38* is located within easy reaching distance from the floor and together with the pinion *35* and rack *34* aHords a convenient means for locking the door *1* in its closed position by simply turning the hand piece *38* in one direct-ion, locking motion being imparted to the lower locking bolt- *6* through the medium of the intermeshing toothed segments *26* and *27*. When the locking bolts are drawn to their locked position by means of the hand piece *38*, the panel *1liis simultaneously thrown inwardly so that its inner face projects some distance from the inner face of the door where it is ready for action in unlocking or releasing the doors by pressure against the same from the inside.

As shown in the drawings, the locking bolts *6* and *7* and connecting rods *11*and *12* together with the movable i *14* and connections between said and bars *11* and *12* are located near the meeting edge of the door *1* sufficiently low down to be engaged by any individual or collection of persons in their effort to escape from the building and in order that these parts may be easily and economically installed, the rods *1l* and *12* are let into lengthwise grooves *40* in the meeting edge of the door just inside of the cap or strips *5* which serves to close the adjacent open side of the groove and aiiords a finish for the meeting edge of the door.

panel panel all` The mechanism whichiiwe have thusv described is applicable for any outwardly swinging single or doublerdoorsand in vLor der thatit .may be applied t'odoors of=vori-- ous sizes or eight, portionslot thefrodfs *11* and *12* connected to the toothed segments *26* and *27* are provided with a plurality of apertures for receiving the pins *31* and *32* whileth'e locking bolts *6* and *7* may be similarly cir-- iinscrewing them upon theendsof-the locking bars *11* and *12e-vf, such bolts being provided with threaded sockets for threaded portions *424* of said *45* which enters a keeper *46* in the .i

meeting edge of said irst'named door,"the inner and outer faces the bolt *45* being rounded or beveledigto of the lockingvvend-of '39h allow it to release itself from its? keeper j when the door *1* is unlocked by pressurel upon the panel so that when thedoor is released, the door *2* will besimilarly released, both doors being forced outwardly to afford ample opening for the escape-of the occupants of the building in case ofiire or other emergency requiring a free exit. lVhat we claim is:

l. In combination with 'a door having recess in its inner face, a locking bolt for the door, and means for unlocking :said bolt including a panel movable in said recess, and mechanism for holding the panel' in a plane parallel with said face while in any of its adjusted positions.

2. In combination with a door having a recess in its inner face, locking bolts :forv

tlic door, and means for unlocking said bolts including a panel movable in said recess, and mechanism for holding the panel inal plane parallel with said tace whilein any of its adjusted positions, and separate means tor locking the bolts and thereby restoring the panel to its outward position.

3. In combination with a door, oppositely movable locking bolts on the door, means for unlocking the bolts including a movable panel and roc-k arms pivoted tojthe door and to said panel and holding the latter ico parallel with the door, and means for moving the bolts to their locking positions and for moving the panel to its `outer position.

4. In combination with a swinging door having a recess in its inner face, a locking holt on the door, a movable box panel havingA its open side guided in said recess, movable means on the door for holding the panel in planes parallel with the inner face lof the door, and connections between said movable tended or shortened by simply 'screwingior .5; :insensameans and' bolt tor unlurmlainp,n the latter as the'panel is moved toward the door.

5. In combination vvit-li a swinging door having a recess in its inner` tace, locking bolts on the door, a movable box panel having its open side guided in said recess, movable means on the door for holdingI the panel in planes parallel with the inner :tace of the door, and connections between said movable means and bolts for unlocking the latter as the panel is moved toward the door, and means for moving the bolts to their loeking positions and for moving? the panel to its outer position.

(5. ln combination with a door, a locking member :i'or the door, a slidingr bar connected with the locking member, a pair of intermeshng toothed segments, one of which is pivotally connected to said bar at one side of its axis, a panel movable to and 'from the inner side of the door, and means actuated by the movement. of the panel tovvard the door for actuating one of the two said segments and thereby moving the locking member from its locking position.

7. In an emergency exit door lock, a pair of sliding]ockingr bolts, intel-meshing toothed segments, each eccentrically connected to one of said bolts, a panel movable to and from the inner side of the door, and connections between .said panel and one of the toothed segments whereby the movement ot the panel toward the door operates said seg;- ments to unlock both ot the bolts.

8. ln combination with a pair of swingingrr doors locking means for one ot' the floors, releasing means 'for said lockingf means including a panel movable toward and from the inner side ot' said one of doors. an additional lockingr bolt for locking the other door to the meeting edge ot the lirst named door, said additional locking member having the inner and outer faces of its lockingr end beveled to permit both doors to swing open when the lirst named door is released.

9. A door locking and releasing mechanism ciimprising a plnralitjyY ot rock arms pivotally mounted upon the door, one above the other. a panel pivotallv mounted upon said rock arms and movable therewith toward and trom the inner face of the door, a locking bolt 'for said door. and means actu la second locking bolt connected to the 'other segment, said segments operating tonnloek their res ective bolts as the panel is moved toward t 1e door.

l1. ln. an emergency exit door look, a i lm i i rality of roclt arms mounted upon the oor one above the other, toothed segments each coaxial with and connected-to one oit the rock arms, a locking bolt connected to-said 1 1 segments, a presser plate pelvotally connected to the rock arms and movable to and trom the inner side of the door, additional toothed segments intermeshing with `the Afirst named segments, and an additional loclting'bolt ec centrically connected to the last namedseg ments, said segments bei ng opera-ble by pressure upon the plate toward the doorl to nnlock the bolts.

12. lln an emergency enit door lock, apllb rality of rock arms mounted upon the door one above the other, toothed segments each so-axial with and connected to one olf the rock arms, a locking bolt connected to said segments, a presser plate pivotally connected to the rock arms and movable to and from the inner side of the door, additional toothed segments intermeshing with the first named segments., and an additional locking bolt ec centrically connected to the last'named seg r ments, said segments being operable by pres sure upon the plate toward the door toon: lock the bolts, and separate means vlor storing;v the lock releasing mechanism to its normal position.

la witness whereof We have hereunto set our hands this 2nd day of June 1908. A RALPH C. HANNUM. HENRY A. llfllllllll'lll.

lVitnesses H. E. CHASE, @anonima lvlcConMAoit.

Copies ot this patent may be obtained for five cents each, by addressing the ommissloner ot Entente, 

